This font contains a bunch of useful ligatures, and by typing 'N', 'r' and period plus activating the discretionary ligatures you get an oldstyle numbersign.
As usual in my blackletter fonts, the # key is occupied by the 'round' s.
Font Family: Deutschmeister
Tags: blackletter, bold, clear, condensed, constructed, crisp, display, german, gothic, leipzig, long s, textura, vintage, wagner, wolpe